How to regain smooth shape whilst scaling a group of edges that contain both creased and non creased edges?
It seems i've solved my own problem after more struggeling. The culprit was me in the end, that went for a crappy geometry (the triangles and such) once i started over clean keeping everything planar until the last steps, the isues were no more. the lesson at the end of the day was; go for squares, not triangles :D.